package lei;

public class lei{//声明一个类
    String name;
    int age;
    double height;
    public void study(){
        System.out.println("业精于勤而荒于嬉");
    }
    public lei(int a,String b, double c){
        age=a;
        name=b;
        height=c;
    }

    public lei(int age) {
        this.age = age;
    }
}
